Ink jet recording head and recording apparatus

Abstract

A highly reliable, small-sized, and inexpensive ink jet recording head includes an electrical wiring member that is joined with a back surface of a liquid discharge substrate and includes a liquid supply port communicating with a liquid supply port of the liquid discharge substrate and an electrical connection portion connected to the electrode; and a holding member that holds the liquid discharge substrate through the electrical wiring member and includes a liquid supply port for supplying the liquid to the liquid supply port of the liquid discharge substrate. The liquid supply ports of the electrical wiring member, the liquid discharge substrate, and the holding member communicate with one another. A sealing agent for sealing the electrical connection portion is filled up between the liquid discharge substrate and the electrical wiring member, and a side surface of the liquid supply port of the electrical wiring member is covered with the sealing agent.

1. An ink jet recording head comprising:
 a liquid discharge substrate that includes a discharge port for discharging a liquid to a surface of the liquid discharge substrate, a liquid supply port for supplying the liquid discharged from the discharge port to a back surface of the liquid discharge substrate, and an electrode for transmitting and receiving a signal for driving energy generating means for discharging the liquid from the discharge port; 
 a film-like electrical wiring member that is joined with the back surface of the liquid discharge substrate, and that includes a liquid supply port communicating with the liquid supply port of the liquid discharge substrate and an electrical connection portion connected to the electrode; and 
 a holding member that holds the liquid discharge substrate through the electrical wiring member, and that includes a liquid supply port for supplying the liquid to the liquid supply port of the liquid discharge substrate, wherein 
 the liquid supply port of the electrical wiring member, the liquid supply port of the liquid discharge substrate, and the liquid supply port of the holding member communicate with one another, 
 a sealing agent for sealing the electrical connection portion is filled up between the liquid discharge substrate and the electrical wiring member, and 
 a side surface of the liquid supply port of the electrical wiring member is covered with the sealing agent. 
 
   
   
     2. The ink jet recording head according to  claim 1 , wherein
 the liquid support port of the electrical wiring member, the liquid supply port of the liquid discharge substrate, and the liquid supply port of the holding member coincide with one another in center line, and 
 the liquid supply port of the electrical wiring member is larger than the liquid supply port of the liquid discharge substrate and the liquid supply port of the holding member. 
 
   
   
     3. An ink jet recording apparatus comprising:
 the ink jet recording head according to  claim 2 ; and 
 a head holding member that holds the ink jet recording head so that the ink jet recording head faces a recording medium. 
 
   
   
     4. The ink jet recording head according to  claim 1 , wherein
 the electrical wiring member is a flexible wiring substrate configured so that wiring layers are formed on both surfaces of a base film, respectively. 
 
   
   
     5. An ink jet recording apparatus comprising:
 the ink jet recording head according to  claim 4 ; and 
 a head holding member that holds the ink jet recording head so that the ink jet recording head faces a recording medium. 
 
   
   
     6. An ink jet recording apparatus comprising:
 the ink jet recording head according to  claim 1 ; and 
 a head holding member that holds the ink jet recording head so that the ink jet recording head faces a recording medium.